| Year | Rank | Number |
| 2010 | 10651 | 10 |
| 2009 | 10125 | 11 |
| 2008 | 9658 | 12 |
| 2007 | 18556 | 5 |
| 2005 | 12216 | 8 |
| 2003 | 16620 | 5 |
| 2002 | 14199 | 6 |
| 1996 | 14287 | 5 |
| 1992 | 10865 | 7 |
| 1991 | 9642 | 8 |
| 1990 | 9556 | 8 |
| 1989 | 13075 | 5 |
| 1982 | 9592 | 6 |
| 1980 | 9470 | 6 |
| Year | Rank | Number |
| 2010 | 10651 | 10 |
| 2009 | 10125 | 11 |
| 2008 | 9658 | 12 |
| 2007 | 18556 | 5 |
| 2005 | 12216 | 8 |
| 2003 | 16620 | 5 |
| 2002 | 14199 | 6 |
| 1996 | 14287 | 5 |
| 1992 | 10865 | 7 |
| 1991 | 9642 | 8 |
| 1990 | 9556 | 8 |
| 1989 | 13075 | 5 |
| 1982 | 9592 | 6 |
| 1980 | 9470 | 6 |